Improvement in driving-wheels



C. I'. GRAVER 8c J. M. WISHART. Driving-Wheel.4

No. 212,663. Patente'd Feb. 425, 1879.

mamas. Pnoovmnoempnan, WASHINGTON- D c* UNITED STATES PATENT FFIGE.

CHARLES F. GRAVER AND JAMES M. WISHART, OF GRINNELL, IOWA.

IMPROVEMENT IN DRIVING-WH EELS.

Specification forming part of Letters Patent No. 212,663, dated February 25, 1879; application filed December 21, 1878.

To all whom 'it may concern:

Be it known that we, CHAELEs F. GRAvER and JAMES M. WIsHART, of Grinnell, in the county of Powesheik and State of Iowa, have invented a new and valuable Improvement in Drive-Vheels; and we do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specilication, and to the letters and figures of reference marked thereon.

Figure l of the drawings is a representation of a side elevation of our drive-wheel, and Fig. 2 is a perspective view of the metal axle.

Our improvement relates to driving-wheels for locomotives and the like, or a drivingwheel for machinery 5 and the novelty consists in the construction and arrangement of parts, as will be` more fully hereinafter set forth.

In carrying out our invention we construct our improved drivin g-wheel with the hub and rim of cast-iron, and cast into these parts the spokes, which are of hollow wrought-1netal pipes.

Cast with the hub are radial arms, the outer ends of which are perforated or otherwise formed to receive securing-bolts, which connect the master-wheel thereto.

Heretofore difficulty has been experienced in casting wrought-iron spokes into cast hubs and rims, the parts not forming solid welding-joints because of the solid cold Wroughtiron chillin gthe molten castiron at these points. We overcome this difficulty by employing spokes of hollow wrought-metal pipe, which fuses readily with the east metal and forms a rigid joint. Said spokes are light, elastic, and have sufficient strength for the purpose.

Heretofore the strain of the runnin g machinery or power has been directly on the spokes of the wheel, the master-wheel being secured thereto or formed in one therewith. This we deem deleterious in its results; and to avoid it we cast in one piece with the hubs radial arms, to which the master-wheel is secured in any desirable manner.

Referring to the drawings, A represents the hub, of cast metal, having cast in one therev with the radial arms A', with securing device a', to receive the master-wheel. (Not shown.) B designates the rim of the driving-wl'leel, of cast metal, and C the curved wrought-iron spokes, of hollow pipe metal, as shown. These spokes are cast with the hub A Al c and the rim B, and form a rigid wheel.

D represents the metal axle, having spindle d, upon which the wheel is secured, and upon which it revolves. A box, Dl, is cast in one therewith, having closed sides d and open top and bottom. Upon the outer end, next the spindle, is a cross-plate, D2, and upon the upper inner end is a cross-plate, D.

The parts are all cast in one, and the sides d d and plates D2 D3 form a socket-bearing for a wooden axle. (Not shown.)

What we claim as new, and desire to secure by Letters Patent, is-` The hub A, having radial arms A c', in. combination with the spokes C and rim B, as specified, for connecting the drivedvlleel with a master-wheel, as set forth.

In testimony that we claim the above weA have hereunto subscribed our names in the presence of two witnesses.

CHAS. F. CRAVER. JAS. M. WISHART.

Witnesses ROBERT M. HAINEs, FRANK V. MILLs. 

